Large exchange bias in magnetic shape memory alloys by tuning magnetic ground state and magnetic-field history

被引:8
|
作者
Liao, Xiaoqi [1 ,2 ,3 ]
Gao, Lumei [4 ]
Wang, Yu [1 ,2 ]
Xu, Xin [1 ,2 ]
Khan, Muhammad Tahir [5 ]
Chang, Tieyan [1 ,2 ]
Chen, Kaiyun [1 ,2 ]
Zeng, Yu-Jia [3 ]
Yang, Sen [1 ,2 ]
Syedlindh, Peter [6 ]
机构
[1] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[3] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
[4] Xi An Jiao Tong Univ, Instrument Anal Ctr, Xian 710049, Peoples R China
[5] RIPHAH Int Univ, Dept Phys, Fac Engn & Appl Sci, 1-14 Campus, Islamabad, Pakistan
[6] Uppsala Univ, Dept Engn Sci, Angstrom Lab, Solid State Phys, S-75121 Uppsala, Sweden
基金
中国国家自然科学基金;
关键词
magnetic shape memory alloys; martensite; exchange bias; spin glass; antiferromagnetic; PHASE-TRANSITION; ANISOTROPY;
D O I
10.1007/s40843-020-1280-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The exchange bias is of technological significance in magnetic recording and spintronic devices. Pursuing a large bias field is a long-term goal for the research field of magnetic shape memory alloys. In this work, a large bias field of 0.53 T is achieved in the Ni50Mn34In16-xFex (x = 1, 3, 5) system by tuning the magnetic ground state (determined by the composition x) and the magnetic-field history (determined by the magnetic field H-FC during field cooling and the maximum field H-Max during isothermal magnetization). The maximum volume fraction of the interfaces between the ferromagnetic clusters and antiferromagnetic matrix and the strong interfacial interaction are achieved by tuning the magnetic ground state and the magnetic-field history, which results in strong magnetic unidirectional anisotropy and the large exchange bias. Moreover, two guidelines were proposed to obtain the large bias field. Firstly, the composition with a magnetic ground state consisting of the dilute spin glass and the strong antiferromagnetic matrix is preferred to obtain a large bias field; secondly, tuning the magnetic-field history by enhancing H-FC and reducing H-Max is beneficial to achieving large exchange bias. Our work provides an effective way for designing magnetically inhomogeneous compounds with large exchange bias.
引用
收藏
页码:1291 / 1299
页数:9
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